Hydraulic control valve

Details Hydraulic control valve Hydraulic control valve

1978-04-17

1980-03-25

Cohen, Irwin C.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

13762564, 13762566, 251 31, F15B 13043, F16K 31124

Patent

active

041947193

ABSTRACT:
A multi-position flow control valve comprises a control piston movable in a boring in two opposite directions. At each end of the boring a pressure chamber is provided accommodating a pressure spring supported on a spring collar that at its end facing the boring has a conical recess. Each recess accommodates a conical projection of a supporting rod that is slidably guided in a blind end bore provided in the control piston. A spring is arranged in the blind end to urge the supporting rod into engagement with the recess in the spring collar. If a pressure fluid is introduced into one pressure chamber, it displaces the piston and compresses the biasing spring in the other pressure chamber whereby the spring biased supporting rods remain in engagement with the recesses in the spring collars.

REFERENCES:
patent: 2767689 (1956-10-01), Moog, Jr.
patent: 3228423 (1966-01-01), Moog, Jr.
patent: 3513877 (1970-05-01), Tennis
patent: 4023593 (1977-05-01), Piccardo
patent: 4114650 (1978-09-01), Gordon

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